Eaton Electrical PROFIBUS-DP EZ204-DP - Manual (Page 127)

Read/write function block data
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Table 52: Operand overview
Table 53: Index 0: Bit IO
Table 54: Index 1 - Mode
Index
(hex) Operand Read Write
00 Bit IO, J Table 53
×
01 Mode, J Table 54 ×
02 Comparison value 1 I1 × c 1
03 Gain factor for I1 (I1 = F1 χ value) F1
×
c 1
04 Comparison value 2 I2
×
c 1
05 Gain factor for I2 (I2 = F2 χ value) F2 × c 1
06 Offset for value I1 OS
×
c 1
07 Switching hysteresis for value I2 (the value of HY
is for both positive and negative hysteresis.)
HY
×
c 1
1) The value can only be written if it is assigned to a constant in the program.
J
The data for index 2 to 7 is transferred as a 32-bit value in
Intel format (Data 1 – Low Byte to Data 4 – High Byte).
Bit 7 6 5 4 3 2 1 0
FB output Data 3 – – – – – – CY 1 Q1 2
1) Status 1 if the value range is exceeded
2) Status 1 if the condition is fulfilled (e.g. I1 < I2 with LT mode)
Data 1
(hex)
00 LT Less than (I1 < I2)
01 EQ Equal to (I1 = IGT)
02 GT Greater than (I1 > I2)